Avinash Kaushik, Digital marketing evangelist, Google Inc.

What: Digital marketing evangelist Where: Google Inc., Mountain View, Calif. Why: Through his blog, Occam’s Razor, and such books as “Web Analytics: An Hour a Day” (Wiley Publishing, 2007), Kaushik has become an authoritative voice on leveraging data to augment the digital marketing experience. Last year, the Digital Analytics Association named him the Most Influential Industry Contributor.